[interpreter, debugger] implement debugger statement.

test/unittests/interpreter/bytecode-array-builder-unittest.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/interpreter/bytecode-array-builder.h"
 #include "src/interpreter/bytecode-array-iterator.h"
 #include "src/interpreter/bytecode-register-allocator.h"
 #include "test/unittests/test-utils.h"
@@ skipping 260 matching lines @@
       .JumpIfTrue(&start)
       .CompareOperation(Token::Value::EQ, reg, Strength::WEAK)
       .JumpIfFalse(&start);
   // Perform an operation that returns a non-boolean operation to
   // generate JumpIfToBooleanTrue/False.
   builder.BinaryOperation(Token::Value::ADD, reg, Strength::WEAK)
       .JumpIfTrue(&start)
       .BinaryOperation(Token::Value::ADD, reg, Strength::WEAK)
       .JumpIfFalse(&start);
 
+  builder.Debugger();
+
   builder.Return();
 
   // Generate BytecodeArray.
   Handle<BytecodeArray> the_array = builder.ToBytecodeArray();
   CHECK_EQ(the_array->frame_size(),
            (builder.fixed_and_temporary_register_count() +
             builder.translation_register_count()) *
                kPointerSize);
 
   // Build scorecard of bytecodes encountered in the BytecodeArray.
@@ skipping 363 matching lines @@
     iterator.Advance();
   }
   CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
   iterator.Advance();
   CHECK(iterator.done());
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8